DC Motors A dc motor can be easily identified by Size of conductor Winding Yoke Commutator Size of conductor Winding Yoke Commutator ANSWER DOWNLOAD EXAMIANS APP
DC Motors If conditions for maximum power for a dc motor are established, the efficiency of the motor will be 80 to 90 % Less than 50% 60 to 70 % 100 % 80 to 90 % Less than 50% 60 to 70 % 100 % ANSWER DOWNLOAD EXAMIANS APP
DC Motors The resistance of shunt field winding as compared to series field winding is More The same Less None of the listed here More The same Less None of the listed here ANSWER DOWNLOAD EXAMIANS APP
DC Motors Which of the following tests will be suitable for testing two similar D.C. series motors of large capacity? Field test Swinburne's test Brake test Hopkinson's test Field test Swinburne's test Brake test Hopkinson's test ANSWER DOWNLOAD EXAMIANS APP
DC Motors Excessive sparking at brushes may be caused due to Misaligment of machine Worn bearings Dirt on the commutator Loose coupling Misaligment of machine Worn bearings Dirt on the commutator Loose coupling ANSWER DOWNLOAD EXAMIANS APP
DC Motors If a D.C. shunt motor is working at no load and if shunt field circuit suddenly opens This will make armature to take heavy current, possibly burning it Motor will run at very slow speed This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Nothing will happen to the motor This will make armature to take heavy current, possibly burning it Motor will run at very slow speed This will result in excessive speed, possibly destroying armature due to excessive centrifugal stresses Nothing will happen to the motor ANSWER DOWNLOAD EXAMIANS APP
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